WBC heavyweight champion Tyson Fury has vowed to step away from social media and dig deep into training camp for a planned unification fight with WBO, IBF, IBO, WBA champion Oleksandr Usyk.

The two sides are targeting a date of April 29 at Wembley Stadium in London.

Over the last few days, the two sides have been trading harsh words over social media.

Usyk's promoter, Alexander Krassyuk, has openly expressed his doubts about Fury's willingness to move forward with the April date.

"The negotiations now go live on Instagram, so we see both fighters exchanging messages," Krassyuk told Sky Sports News. "We are expecting to get some basic agreement with the terms and things like that but it's still pending.

"We've been negotiating for so many months. We went through all the small issues, bigger issues, large issues whatever. So it's all done already. It's been done actually several weeks ago. But the one thing that was pending was Tyson's consent, which is still pending. Though he claims he's ready and pretends he's training. It doesn't look convincing but it's still the case."

Fury took to social media on Tuesday, to assure the public that he's planning to start a serious training camp and has every intention of moving forward with the April date.

"Hi guys, as fun as it's been over the last few days terrorizing Usyk and his team, tomorrow I'm going to knuckle down into training camp, and I'll be doing a blackout as I always do on social media. Nav (Salimian) will be running my Instagram account, keeping you all updated on my training progress, and how everything is going," Fury said.

"April 29 is definitely a worker, I will see you all on the night. Tune in, or be there or be square. This is the biggest event in British boxing history, the fight of the century. Two undefeated world heavyweight champions throwing down to see who is No 1 in the division: the undisputed world heavyweight championship on the line. Peace out, good training to Usyk, may the best man win."